code: def setUp(self):
      super().setUp()
      self.init_mlmd()
      # We have to __enter__ Metadata which activates the MetadataStore so that
      # we can use the same fake in-memory MetadataStore instance during the
      # single test.
      self.enter_context(self.mlmd_handle)
  
file_path: tfx/tfx/orchestration/portable/input_resolution/channel_resolver_test.py
imports: import tensorflow
  from tfx.orchestration.portable.input_resolution import channel_resolver
  from tfx.proto.orchestration import pipeline_pb2
  from tfx.utils import test_case_utils
  from google.protobuf import text_format
label_desc: Use image node_id 1 for calling the ChannelResolverTest obj's underlying member method code with example usage: obj.setUp() without return types